28387613848 has 64 divisors (see below), whose sum is σ = 59347883520. Its totient is φ = 12618940800.

The previous prime is 28387613833. The next prime is 28387613857. The reversal of 28387613848 is 84831678382.

It is a super-2 number, since 2×28387613848² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28387613792 and 28387613801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8315790 + ... + 8319202.

It is an arithmetic number, because the mean of its divisors is an integer number (927310680).

Almost surely, 2^28387613848 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28387613848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29673941760).

28387613848 is an abundant number, since it is smaller than the sum of its proper divisors (30960269672).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28387613848 is a wasteful number, since it uses less digits than its factorization.

28387613848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5488 (or 5484 counting only the distinct ones).

The product of its digits is 12386304, while the sum is 58.

The spelling of 28387613848 in words is "twenty-eight billion, three hundred eighty-seven million, six hundred thirteen thousand, eight hundred forty-eight".